The purpose of this document is to describe a set of guidelines and recommendations for a standard use of the SDN Northbound interface of the Optical SDN domain controller for the implementation of the interface between network systems in charge of the control/management of networks based on WDM/OTN technologies.

This document aims to define the base requirements for any SDN Domain controller entity (e.g., a SDN-C) which is intended to expose the management/control capabilities of any use case such as activation/configuration, service provisioning, path-computation, fault management and monitoring over a WDM/OTN network, through the interface defined in this document.